Reflection and Refraction of Micropolar Magneto-thermoviscoelastic Waves at the Interface between Two Micropolar Viscoelastic Media

Using micropolar generalized thermoviscoelastic theories, problems of reflection and refraction of magneto-thermoeviscoelastic waves at the interface between two viscoelastic media are studied when a uniform magnetic field permeates the media. Coefficient ratios of reflection and refraction are obtained using continuous boundary conditions. Some special cases are considered, i.e., the absence of micropolar and viscous effects. By numerical calculations, variations of the amplitude ratios of reflection and refraction coefficients with the angle of incidence are shown graphically for incident rotational and dilatational waves at the interface between two media (one medium is aluminium-epoxy micropolar iscoelastic material, and the other is magnesium crystal micropolar viscoelastic material). Comparing the generalized thermoelastic theories developed by Lord and Shulman (LS) and by Green and Lindsay (GL) in this paper to conventional dynamics (CD) theory the effects of a magnetic field and viscosity are shown numerically in this paper.     

城市规划的色彩时代

1．城市色彩环境的中国现实综述 有关城市色彩的讨论，是近年来探讨城市形象的重要话题。城市色彩因其突出的城市形象要素，真实醒目地存在于我们的视野中。通常所说的城市色彩环境，是指在白昼光下城市物体外部的色彩总和，是城市实体色彩要素的整体色彩面貌。     

Highly conductive bridges between graphite spheres to improve the cycle performance of a graphite anode in lithium-ion batteries

Spherical carbon-coated natural graphite (SCCNG) is a promising anode material for lithium-ion batteries, but the smooth surface of graphite spheres is difficult to wet with an aqueous binder solution, and lacks electrical contacts. As a result, the cycle performance of such a graphite anode material is not satisfactory. An effective method has been introduced to tightly connect adjacent SCCNG particles by a highly conductive binder, viz. acetylene black bridges. The effect of the conductive bridges on the cyclability of SCCNG electrode has been investigated.     

医药商业企业信息化建设中的ERP管理浅探

介绍了山西省医药集团所属商业企业实施ERP系统过程中的体会，包括医药商企业ERP系统的信息流分析、目标制订、设计原则及资料管理。     

真空辅助灌浆技术在柳州红光桥锚碇预应力施工中的应用

本介绍了真空辅助灌浆技术在柳州红光桥锚碇预应力施工中的具体应用，通过T程实践，总结出几点施工要点。     

陶瓷丝网印刷金膏的研究

通过研究，成功地完成了陶瓷丝网金膏的研制。     

试论我国中小企业信息化之障碍及对策

中小企业摆脱困境的唯一出路，就是积极进行信息化建设。为此，应进一步加强政府的宏观引导与政策支持，配合企业经营体制改革，加大资金投入，结俣中小企业实际合理选择开发模式，找准突破点，推进中小企业信息化建设。     

一种基于非线性变换的EP潜伏期变化自适应检测方法

该文依据分数低阶矩理论和诱发电位（EP）信号及噪声的低阶α稳定分布特性，提出了一种自适应检测EP潜伏期变化的新方法。这种方法基于sigmoid函数对误差信号en(k)进行连续的非线性变换，即抑制了EP信号中的低阶α稳定分布噪声，又有效保留了信号成分，在高斯和低阶α稳定分布噪声条件下具有很好的韧性，且无须动态估计信号噪声的α参数。利用这种方法动态检测EP潜伏期的变化，比以往的DLMS，DLMP和SDA等算法具有较高的估计精度和较快的收敛速度，是一种具有较高韧性的性能优良的EP潜伏期变化动态检测方法。     

大功率高频软开关逆变焊机

逆变焊机技术经历了近10年的发展,经历了最初的硬开关PWM功率变换阶段,现已进入了它的第二个发展阶段——软开关PWM阶段。本文简要介绍了一种利用软开关技术实现的逆变焊机的设计方案及全桥软开关逆变焊机的基本工作原理,利用软开关技术可降低功率器件的开关损耗,提高逆变焊机的效率和可靠性。     

矿浆泵软起动控制回路的节电改进

针对攀钢选矿厂16个球磨系统中矿浆泵软起动控制回路,分析了旁路接触器的工作特点,提出了交流接触器的节电改进方法.该改进节电、降温、简单、实用,具有推广使用价值.